Great Salt Bay Sanitary District, ME
Exceeded the action level in the past
Latest 90th-percentile lead: 1.2 ppb (monitoring period 2025-2025). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest result is under the action level, but this system has gone over 15 ppb before. Lead comes from pipes, not the source water, so a home with a lead service line can still be exposed. Test your own tap.
About Great Salt Bay Sanitary District
Great Salt Bay Sanitary District serves about 2,143 people through 857 service connections, which makes it a small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Lincoln County, Maine. EPA system ID: ME0090410; phone on file: 207-563-5105. They can tell you what your service line is made of and whether they pay to replace it.
Great Salt Bay Sanitary District's lead record
That is up 1.2 ppb from 0 ppb in the period ending 2024. The highest 90th-percentile result EPA holds for Great Salt Bay Sanitary District is 29 ppb across 11 monitoring periods, 3 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.2 ppb |
| 2024 | 0 (not detected) |
| 2023 | 3.9 ppb |
| 2022 | 5.1 ppb |
| 2022 | 7 ppb |
| 2021 | 21 ppb over 15 |
| 2021 | 9.4 ppb |
| 2020 | 26 ppb over 15 |
| 2020 | 12 ppb over 10 |
| 2019 | 29 ppb over 15 |
| 2016 | 7.2 ppb |
Against other Maine systems
Of the 358 Maine systems with a lead result, the median latest reading is 1.5 ppb; 2 are over 15 ppb right now and 40 have gone over at some point. Great Salt Bay Sanitary District's 1.2 ppb sits at the 44th percentile in Maine and the 59th nationally (higher means more lead).
Nearby utilities
10 other systems share Lincoln County; 3 of them have a higher latest lead result than Great Salt Bay Sanitary District. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Boothbay Region Water District | 8,448 | 0 (not detected) |
| Wiscasset Water District | 1,970 | 5.3 ppb |
| Waldoboro Water Dept | 1,065 | 0 (not detected) |
| Indian Run Estates Llc | 103 | 5.1 ppb |
| Whippoorwill Hill Mobile Home | 85 | 0 (not detected) |
| Maplewood Mobile Home Park | 70 | 0.8 ppb |
| East Ridge Mobile Home Park | 70 | 0.9 ppb |
| Brookside Mobile Home Court | 58 | 0.7 ppb |
| Pines Mobile Home Park Llc | 50 | 2.4 ppb |
| Dresden Water Department | 43 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Damariscotta, ME may offer free or low-cost kits through the utility. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Great Salt Bay Sanitary District whether it covers that cost before hiring anyone - many utilities now do.
These figures describe homes the utility sampled, not your tap. Only your service line record or a test of your own water answers the question for your house. The lead result guide covers how utilities pick the homes they sample. Why an old exceedance still matters: over the limit before, under it now.